Lock 1 of the Trent–Severn Waterway sits in the heart of Trenton, where the Trent River empties into the Bay of Quinte. In summer, the lock is in constant use as cruisers, sailboats, and runabouts begin or end the 386-kilometre journey across Ontario to Georgian Bay. Watching a boat lock through — rising or descending several metres as water pours in or drains out — is a small, free spectacle that has charmed visitors since the waterway opened.
The surrounding waterfront park has been nicely developed, with a boardwalk, benches, and views over the bay. The town's commercial centre is within easy walking distance. Parks Canada operates a small visitor centre near the lock during summer months.